91995755009 has 16 divisors (see below), whose sum is σ = 96756432960. Its totient is φ = 87358098240.

The previous prime is 91995754997. The next prime is 91995755081. The reversal of 91995755009 is 90055759919.

It is not a de Polignac number, because 91995755009 - 2³⁶ = 23276278273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91995755309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2031587 + ... + 2076375.

It is an arithmetic number, because the mean of its divisors is an integer number (6047277060).

Almost surely, 2^91995755009 is an apocalyptic number.

It is an amenable number.

91995755009 is a deficient number, since it is larger than the sum of its proper divisors (4760677951).

91995755009 is a wasteful number, since it uses less digits than its factorization.

91995755009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46160.

The product of its (nonzero) digits is 5740875, while the sum is 59.

The spelling of 91995755009 in words is "ninety-one billion, nine hundred ninety-five million, seven hundred fifty-five thousand, nine".